A free app for Android, by Paul Lutus.

SSHelper is a secure server for the Android platform. It offers advanced, multi-protocol, secure communication services without the need for user attention.

It is designed to be used with non-rooted devices, so you don’t need to install special software to use it.

How does SSHelper work?

The service does not need user attention and works in the background.

SSHelper is designed to run as a service in the background, providing secure, efficient communication protocols for all supported platforms: Windows, Linux, Mac, and Android. 

The service offers different types of transfers, including scp, sftp, and rsync, on all supported platforms: Windows, Linux, Mac, and Android. It is possible to create an interactive Secure Shell (hereafter SSH) session and use the application as a regular shell. It is possible to use the service directly with a file browser, by specifying the “sftp:” protocol.